Hello everyone we are group
2. Today we are going to talk
about light pollution
Member:Hưng,Nhi,Quân,Nam
Editor:Hưng,Namsadboy,Quân

First we have to find
out what is light
pollution?
Light

pollution is the use of
excessive or improper lighting,
especially in public lighting,
causing glare, shining into
houses and brightening the
night sky.

Reason


When light shines up, down, or reflects upward, it is scattered by
layers in the atmosphere, creating a glow that reduces the darkness
of the night sky that causes light pollution

EFFECTS OF LIGHT POLLUTION


BECAUSE LIGHT POLLUTION,WE CAN'T SEE MORE STARS ON THE SKY



STARS IN CITY IS LESS LIGHT THAN STARS IN COUNTRY



COUNTRY

CITY

LIGHT POLLUTION
CAUSE HARMFULL TO
THE ECONOMY
THE MONEYS TO PAY FOR
LIGHT ACTIVITES IN RICK
COUTRY IS VERY VERY MUCH

LIGHT POLLUTION
CAUSE HARMFULL
TO THE HUMAN

IF YOU SEE LIGHT TOO LONG,YOU CAN BE
BLIND, SLEEP DISORDERS,MAKE HUMAN
CANCER AND STRESS

-Use only enough lights for
your needs. Turn off lights or
use timer mode when not
needed
-Choose the right lights,
illuminate the right area,
have little effect on the
surrounding environment
-Install the lights so that the
wavelengths of light cause
less serious problems
-Limit the use of artificial light
at night
-Limit your exposure to blue
light when you don't need it.

Good Bye


Thank you teacher and everyone for listening.
Group 2